A non-coal mine ground pressure monitoring device
Through modular mechanical structure and intelligent control, the problem of rapid disassembly and flexible adjustment of mine ground pressure monitoring devices has been solved, improving monitoring accuracy and stability, and making it suitable for dynamic mining environments in non-coal mines.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNMING ENG & RES INST OF NONFERROUS METALLURGY
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-07
AI Technical Summary
Existing mine ground pressure monitoring devices suffer from problems during installation and maintenance, such as difficulty in quick disassembly, inconvenience in installation, difficulty in effectively fitting the inner wall of the roadway, resulting in low monitoring accuracy, easy damage to sensors, and inability to flexibly adjust the monitoring area.
It adopts a modular mechanical structure, including a lifting mechanism, an angle adjustment mechanism, and an elastic clamping mechanism. The height and angle of the monitor are adjusted by a motor-driven sprocket and chain transmission. Combined with damping gears and an elastic clamping mechanism, it ensures that the monitor fits tightly against the inner wall of the tunnel, supporting quick disassembly and flexible adjustment.
It enables rapid disassembly and assembly and flexible adjustment of the monitor, improves monitoring accuracy and stability, reduces maintenance costs and time, expands the monitoring range, and adapts to complex tunnel environments.
Smart Images
Figure CN224469982U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of ground pressure monitoring technology, specifically relating to a ground pressure monitoring device for non-coal mines that is simple in structure, highly adaptable, stable, easy to disassemble and maintain, and easy to adjust. Background Technology
[0002] A metal mine refers to a geological body in the Earth's crust rich in metallic ores, used for mining and extracting metallic elements. Ground pressure refers to the forces existing within a rock mass, including the forces exerted by the original rock on the surrounding rock, the interactions between surrounding rocks, and the forces exerted by the surrounding rock on the support structure. The magnitude of ground pressure depends not only on the stress state, physical and mechanical properties, and structure of the rock mass, but also on factors such as engineering characteristics, support type, and support duration. Furthermore, ground pressure can cause deformation, movement, and damage to the surrounding rock and the support structure. Therefore, monitoring ground pressure in mines is a crucial means of ensuring safe mine production and improving resource extraction efficiency.
[0003] In existing technologies, mine ground pressure monitoring devices mostly employ the installation of mechanical and displacement sensors through boreholes drilled inside the rock mass to directly measure stress or strain changes in the rock mass or support structure. While this technology is relatively mature and reliable, and can provide continuous automatic monitoring, it also faces challenges such as the influence of installation quality, temperature, humidity, and electromagnetic interference on the measurement results. Furthermore, sensors and cables are susceptible to damage from blasting, rock movement, and mechanical stress in harsh environments, and the boreholes themselves can disturb the stress field of the rock mass. To address these issues, geophysical monitoring devices also exist that infer ground pressure activity by monitoring changes in the physical fields (sound, vibration, electricity, and magnetism) generated by rock mass fractures or structural changes. Although these devices can cover the entire mining area or even the entire mine, directly sensing fracture activity within the rock mass and capturing the dynamic damage evolution process in real time, they measure physical field signals and require complex algorithms to invert rock mass state information, introducing uncertainty. Moreover, the sensors, high-speed data acquisition equipment, and specialized analysis software for microseismic systems are costly, and data acquisition, processing, and interpretation require highly specialized knowledge and experience, thus limiting their practical application. In addition, there is fiber optic sensing monitoring that uses the principle that the characteristics of light propagating in optical fibers (intensity, phase, wavelength, polarization state) change due to modulation by external physical quantities (strain, temperature, vibration) to make measurements. However, its application is limited by problems such as the fragility of optical fibers requiring careful installation and effective protection to prevent construction damage, the dependence of measurement accuracy on the coupling quality between the optical fiber and the rock mass / structure, slow demodulation speed, and cross-sensitivity to temperature and strain.
[0004] Currently, the technology of monitoring mine ground pressure by directly attaching stress monitors to the inner wall of roadways is relatively mature and avoids the shortcomings of borehole monitoring. For example, patent CN217637733U discloses a mine ground pressure monitoring device, including a mounting guide cylinder with an upper cover plate above it. The upper cover plate is fitted with a displacement adjustment mechanism and a guide shaft. A sliding guide plate is fitted between the displacement adjustment mechanism and the guide shaft. The displacement adjustment mechanism and the guide shaft improve the stability of the sliding guide plate, which is beneficial to improving the detection accuracy of the stress sensor. The sliding guide plate is connected to an elastic guide shaft by screws. In the mine ground pressure monitoring device, through the cooperation of various components, the position of the stress sensor is adjusted by the displacement adjustment mechanism, allowing the stress sensor to be easily removed and recycled. Through the cooperation of components such as the displacement adjustment mechanism, the guide shaft, and the fixing block, the stability and detection accuracy of the stress sensor are effectively improved. However, because the stress monitor is fixedly installed during use, it is difficult to quickly disassemble and install, making subsequent maintenance and replacement troublesome. Furthermore, the irregular structure of the tunnel's inner wall prevents the stress monitor from effectively adhering to the wall, affecting monitoring accuracy. Additionally, the stress monitor cannot be reliably adjusted in height as needed, resulting in a limited monitoring area. Utility Model Content
[0005] To address the problems mentioned in the background section, this utility model provides a non-coal mine ground pressure monitoring device that is simple in structure, highly adaptable, stable, easy to disassemble and maintain, and convenient to adjust.
[0006] The ground pressure monitoring device for non-coal mines of this utility model is implemented as follows: it includes a chassis and a mounting frame. The bottom of the chassis is provided with multiple casters, and the mounting frame is vertically fixed at the upper rear end of the chassis.
[0007] A support plate is provided on the upper part of the mounting frame, and a lifting mechanism is provided on the chassis and mounting frame. The lifting and moving end of the lifting mechanism is fixedly connected to the support plate.
[0008] It also includes an angle adjustment mechanism and a monitor body. The angle adjustment mechanism includes a mounting plate, a fixing plate, a damping gear, and an adjustment base. The mounting plate is fixedly installed at the front end of the support plate away from the mounting frame. The two sides of the mounting plate are respectively vertically fixed with upwardly extending fixing plates. The damping gear is rotatably installed inside the fixing plate. The adjustment base is installed between the two fixing plates above the mounting plate. The two ends of the adjustment base are respectively fixedly connected to the damping gears on the two fixing plates of the mounting plate. The top of the adjustment base is fixedly installed with an elastic clamping mechanism. The monitor body is detachably installed on the elastic clamping mechanism.
[0009] Furthermore, the elastic clamping mechanism includes a placement frame, a rebound unit, and a lower pressure plate. The placement frame is detachably fixed at the top of the adjusting base. A connecting groove is provided at the front end of the top of the placement frame away from the mounting frame. The lower part of the monitor body is slidably inserted into the connecting groove. The rebound unit is located at the rear end of the top of the placement frame near the mounting frame. The rear end of the lower pressure plate is slidably inserted into the rear end of the placement frame and connected to the rebound unit. The front end of the lower pressure plate extends above the connecting groove and can abut against the top of the monitor body inserted into the connecting groove.
[0010] Furthermore, the placement frame is an "L"-shaped double-step structure with a connecting groove at the top of the lower step. A sliding groove is provided in the upper step of the placement frame. The rebound unit is movably disposed in the sliding groove and its bottom end is fixedly connected to the sliding groove. A sliding plate that can slide and extend into the sliding groove is fixedly disposed at the rear end of the lower pressure plate. The sliding plate is fixedly connected to the upper part of the rebound unit.
[0011] Furthermore, the rebound unit is a damping spring or a tension spring; at least two sliding grooves are provided at intervals in the upper step of the placement frame; the rear end of the lower pressure plate is fixedly provided with a number of sliding plates corresponding to the sliding grooves of the placement frame; the sliding groove is a rectangular groove and one or both ends are provided with mortises; one or both ends of the sliding plate are provided with tenons that slide with the mortises on the sliding groove.
[0012] Furthermore, the lifting mechanism includes a first bracket, a first rotating shaft, a first sprocket, a chain, a motor, a second bracket, a second rotating shaft, and a second sprocket. First brackets are fixedly installed on both sides of the top of the mounting frame. The first rotating shaft is positioned above the mounting frame and its two ends are rotatably connected to the two first brackets respectively. The motor is fixed on one of the first brackets, and its shaft is connected to the first rotating shaft. Two first sprockets are fixedly installed at intervals on the first rotating shaft. Second brackets are fixedly installed on both sides inside the housing. The second rotating shaft is parallel to the first rotating shaft and its two ends are rotatably connected to the two second brackets respectively. Two second sprockets are fixedly installed at intervals on the second rotating shaft. The chain is correspondingly sleeved on the first and second sprockets on the same side, and the two chains are fixedly connected to the support plate respectively.
[0013] Furthermore, connecting plates are fixedly provided on the left and right sides of the top and bottom ends of the support plate away from the mounting plate, and hinge ears are provided on the connecting plates. The two ends of the chain are respectively hinged to the hinge ears on the connecting plates at the top and bottom ends of the support plate.
[0014] Furthermore, a lifting rod is vertically fixedly installed below the two connecting plates at the bottom end of the support plate inside the mounting frame, and the top end of the sliding rod of the lifting rod is fixedly connected to the bottom end of the support plate between the two connecting plates.
[0015] Further, the mounting frame is a frame structure with an open front end.让位孔 are provided at the top and bottom of the mounting frame in front of and behind the first sprocket wheel, and can pass through the chain movably. The machine box is a hollow cube structure, and a让位孔 corresponding to the mounting frame is provided at the top and can pass through the chain movably.
[0016] Further, the side of the support plate away from the angle adjustment mechanism is a flat cube structure and extends into the mounting frame. The connection of the two chains at the bottom end of the support plate and the connection of the top end of the sliding rod of the lifting rod form a "pin" - shaped layout. The side of the support plate close to the angle adjustment mechanism is a cantilever - shaped flat plate extending out of the mounting frame or a flat plate with a diagonal brace at the bottom.
[0017] Further, a controller is fixedly arranged on the outer side wall of the mounting frame, and the motor is electrically connected to the controller.
[0018] The utility model has the following beneficial effects:
[0019] 1. The utility model realizes the rapid loading and unloading of the monitor body through the elastic pressing mechanism. That is, the lower part of the monitor is slidably inserted into the connection groove of the placement rack, and with the elastic pressing and release of the lower pressing plate and the spring - back unit, the fixation and disassembly can be completed without screws and tools, greatly simplifying the operation process of later maintenance and replacement, and reducing the manual labor intensity.
[0020] 2. The angle adjustment mechanism of the utility model realizes the flexible adjustment of the base angle through the damping gear, and can accurately adjust the fitting angle between the monitor body and the rock wall according to the inclination of the inner wall of the roadway or the irregular curved surface, ensuring that the monitoring surface is in close contact with the inner wall of the roadway. At the same time, the spring - back unit of the elastic pressing mechanism can provide a continuous and appropriate pressing force, further ensuring the fitting stability, effectively reducing the monitoring error caused by poor contact, and significantly improving the adaptability to complex and irregular roadway surfaces.
[0021] 3. The lifting mechanism of the utility model drives the sprocket wheel and chain transmission through the motor, and with the guiding function of the lifting rod, it can stably drive the support plate and the monitor body to realize height adjustment, breaking through the limitation of a single monitoring area in the traditional fixed installation mode. It can flexibly adjust the monitoring height according to the mining progress or the key points of ground pressure monitoring, expand the monitoring range, and meet the requirements of ground pressure data collection at different depths and positions.
[0022] It should be noted that there are some unclear "让位孔" in the original text which need to be further clarified in the source to ensure more accurate translation. Here, I just keep them as they are in the translation.4. The lifting mechanism of this utility model adopts a double-chain synchronous transmission and a lifting rod for auxiliary guidance, ensuring that the lifting process of the support plate is smooth and without shaking; the angle adjustment mechanism can fix the adjusted angle through the self-locking characteristic of the damping gear; the elastic clamping mechanism, through the cooperation of the tenon and the groove and the stabilizing force of the rebound unit, can not only compensate for the unevenness of the roadway wall to ensure a tight fit, but also prevent the monitor from shifting or falling off in the vibration environment of the mine. The overall structure works together to ensure the stability of the monitoring process and reduce the impact of external interference on data acquisition.
[0023] In summary, this utility model, through its modular mechanical structure (lifting + angle + clamping) and intelligent control (motor + controller), enables flexible deployment, precise fitting, and efficient operation and maintenance of mine ground pressure monitoring devices, which is significantly superior to existing fixed or borehole-type solutions and is especially suitable for dynamic mining environment ground pressure monitoring applications in non-coal mines. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the structure of this utility model;
[0025] Figure 2 This is a partial exploded view of the angle adjustment mechanism and elastic clamping mechanism of this utility model;
[0026] Figure 3 This is a schematic diagram of the lifting mechanism structure of this utility model;
[0027] Figure 4 for Figure 1 A schematic diagram of the structure after removing the angle adjustment mechanism and the elastic clamping mechanism;
[0028] In the diagram: 1-Chassis, 2-Mounting frame, 3-Wheel caster, 4-Support plate, 5-Lifting rod, 6-Mounting plate, 7-Fixing plate, 8-Damping gear, 9-Adjusting base, 10-Monitor body, 11-Placement frame, 12-Rebound unit, 13-Pressing plate, 14-Connecting groove, 15-Sliding groove, 16-Sliding plate, 17-Controller, 18-Hinge ring, 21-First bracket, 22-First shaft, 23-First sprocket, 24-Chain, 25-Motor, 26-Second bracket, 27-Second shaft, 28-Second sprocket, 29-Connecting plate, 30-Leaving hole. Detailed Implementation
[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this does not limit the present invention in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention.
[0030] like Figure 1 , 2As shown in Figures 3 and 4, the non-coal mine ground pressure monitoring device of this utility model includes a housing 1 and a mounting frame 2. The bottom of the housing 1 is provided with multiple casters 3, and the mounting frame 2 is vertically fixed at the upper rear end of the housing 1.
[0031] A support plate 4 is provided on the upper part of the mounting frame 2, and a lifting mechanism is provided on the chassis 1 and the mounting frame 2. The lifting and moving end of the lifting mechanism is fixedly connected to the support plate 4.
[0032] like Figure 2 As shown, it also includes an angle adjustment mechanism and a monitor body 10. The angle adjustment mechanism includes a mounting plate 6, a fixing plate 7, a damping gear 8, and an adjustment base 9. The mounting plate 6 is fixedly installed at the front end of the support plate 4 away from the mounting frame 2. The two sides of the mounting plate 6 are respectively vertically fixed with upwardly extending fixing plates 7. The damping gear 8 is rotatably installed inside the fixing plate 7. The adjustment base 9 is installed between the two fixing plates 7 above the mounting plate 6. The two ends of the adjustment base 9 are respectively fixedly connected to the damping gear 8 on the two fixing plates 7 on the mounting plate 6. The top of the adjustment base 9 is fixedly provided with an elastic pressing mechanism. The monitor body 10 is detachably installed on the elastic pressing mechanism.
[0033] A hinge ring 18 is fixedly provided on the inner side of the fixed plate 7, and two damping gears 8 are respectively fixedly provided at both ends of the adjusting base 9. The damping gears 8 mesh with the corresponding hinge rings 18 on the same side.
[0034] like Figure 2 As shown, the elastic clamping mechanism includes a placement frame 11, a rebound unit 12, and a lower pressure plate 13. The placement frame 11 is detachably fixed at the top of the adjusting base 9. A connecting groove 14 is provided at the front end of the top of the placement frame 11 away from the mounting frame 2. The lower part of the monitor body 10 is slidably inserted into the connecting groove 14. The rebound unit 12 is located at the rear end of the top of the placement frame 11 near the mounting frame 2. The rear end of the lower pressure plate 13 is slidably inserted into the rear end of the placement frame 11 and connected to the rebound unit 12. The front end of the lower pressure plate 13 extends above the connecting groove 14 and can abut against the top of the monitor body 10 inserted into the connecting groove 14.
[0035] The placement rack 11 has an "L"-shaped double-step structure and the connecting groove 14 is located at the top of the lower step. The upper step of the placement rack 11 is provided with a sliding groove 15. The rebound unit 12 is movably disposed in the sliding groove 15 and its bottom end is fixedly connected to the sliding groove 15. The rear end of the lower pressure plate 13 is fixedly provided with a sliding plate 16 that can slide into the sliding groove 15. The sliding plate 16 is fixedly connected to the upper part of the rebound unit 12.
[0036] The rebound unit 12 is a damping spring or a tension spring; at least two sliding grooves 15 are provided at intervals in the upper step of the placement frame 11; the rear end of the lower pressure plate 13 is fixedly provided with a number of sliding plates 16 corresponding to the sliding grooves 15 of the placement frame 11; the sliding groove 15 is a rectangular groove and a mortise is provided at one or both ends; one or both ends of the sliding plate 16 are provided with a tenon that slides with the mortise on the sliding groove 15.
[0037] like Figure 3 As shown, the lifting mechanism includes a first bracket 21, a first rotating shaft 22, a first sprocket 23, a chain 24, a motor 25, a second bracket 26, a second rotating shaft 27, and a second sprocket 28. The first bracket 21 is fixedly installed on both sides of the top of the mounting frame 2. The first rotating shaft 22 is positioned above the mounting frame 2 and its two ends are rotatably connected to the two first brackets 21 respectively. The motor 25 is fixed on one of the first brackets 21, and its motor shaft is connected to the first rotating shaft 22. Two first sprockets 23 are fixedly installed at intervals on the first rotating shaft 22. The second bracket 26 is fixedly installed on both sides inside the housing 1. The second rotating shaft 27 is parallel to the first rotating shaft 22 and its two ends are rotatably connected to the two second brackets 26 respectively. Two second sprockets 28 are fixedly installed at intervals on the second rotating shaft 27. The chain 24 is correspondingly sleeved on the first sprocket 23 and the second sprocket 28 on the same side. The two chains 24 are fixedly connected to the support plate 4 respectively.
[0038] like Figure 4 As shown, connecting plates 29 are fixedly installed on the left and right sides of the top and bottom ends of the support plate 4 away from the mounting plate 6, respectively. The connecting plates 29 are provided with hinge ears, and the two ends of the chain 24 are respectively hinged to the hinge ears on the connecting plates 29 at the top and bottom ends of the support plate 4.
[0039] A lifting rod 5 is vertically fixedly installed below the two connecting plates 29 at the bottom end of the support plate 4 inside the mounting frame 2. The top end of the sliding rod of the lifting rod 5 is fixedly connected to the bottom end of the support plate 4 between the two connecting plates 29.
[0040] The mounting frame 2 is a frame-shaped structure with an open front end. The top and bottom ends of the mounting frame 2 are provided with clearance holes 30, which allow the chain 24 to pass through, located in front of and behind the first sprocket 23. The chassis 1 is a hollow cube structure, and its top end is also provided with clearance holes 30, corresponding to those of the mounting frame 2, allowing the chain 24 to pass through. The clearance holes 30 limit the movement of the chain 24, ensuring the stability of the support plate 4 when it moves upward and downward.
[0041] The side of the support plate 4 away from the angle adjustment mechanism is a flat cube structure and extends into the mounting frame 2. The connection of the two chains 24 at the bottom end of the support plate 4 and the connection of the top end of the sliding rod of the lifting rod 5 form a "pin" - shaped layout. The side of the support plate 4 close to the angle adjustment mechanism is a cantilever - shaped flat plate extending out of the mounting frame 2 or a flat plate with a diagonal brace at the bottom.
[0042] A controller 17 is fixedly arranged on the outer wall of the mounting frame 2, and the motor 25 is electrically connected to the controller 17.
[0043] The controller 17 is a PLC or a general control circuit.
[0044] The working principle and process of the present utility model:
[0045] As shown in Figure 1 、 2 Figures 3 and 4, the ground pressure monitoring device of the present utility model is moved to the monitoring position through the universal wheels 3, the installation environment is confirmed to be stable, and it is ensured that the chassis 1 and the mounting frame 2 are firm.
[0046] Installation of the monitor body 10 (such as a vibration signal detector with the model number HJ04 - HS5944): The staff lifts the lower pressing plate 13 upwards to increase the distance between it and the placing rack 11. At this time, the lower pressing plate 13 is linked with the elastic unit 12 (such as a damping spring) in the sliding groove 15 through the sliding plate 16. When stretching, the sliding plate 16 moves smoothly upwards along the sliding groove 15. Then, the lower part of the monitor body 10 is inserted into the connection groove 14, and then the lower pressing plate 13 is slowly released. The resilience of the elastic unit 12 makes the lower pressing plate 13 press tightly against the monitor body 10. Since the distance between the lower pressing plate 13 and the placing rack 11 is adjustable, monitors of different sizes can be adapted. When disassembling, manually lift the lower pressing plate 13, and the monitor body 10 can be directly taken out. Since there is no need to disassemble the whole device during maintenance or replacement, only single - person operation is required. Through the above - mentioned tool - free pressing structure, elastic release design, and independent component design, the rapid installation and disassembly of the monitor body 10 are realized, avoiding overall disassembly, supporting plug - and - play. At the same time, the single - time installation / disassembly time ≤ 2 minutes, the disassembly and assembly efficiency is 4 times higher than the traditional screw - fixing method, the cost of component maintenance and replacement is reduced by 50%, and the maintenance working hours are reduced by 60%.
[0047] Angle adjustment of the monitor body 10: According to the inclination of the inner wall of the roadway to be measured or the irregular curved surface, manually rotate the damping gear 8. Through the meshing transmission between the damping gear 8 and the articulated ring 18, precise angle adjustment of the adjustment base 9 is realized, so that the monitoring surface of the monitor body 10 is in close contact with the inner wall of the roadway to be measured. Moreover, the elastic force of the elastic unit 12 acting on the monitor body 10 through the lower pressing plate 13 can compensate for the uneven surface of the inner wall of the roadway, making the fitting tightness increase by more than 90%.
[0048] Height adjustment of the monitor body 10: According to the height of the inner wall of the tunnel to be measured, the motor 25 is started, driving the first rotating shaft 22 to rotate, which in turn drives the first sprocket 23 to rotate. The rotating first sprocket 23 engages with the chain 24 to pull the support plate 4 up or down. At the same time, the sliding rod of the lifting rod 5 at the bottom of the support plate 4 moves accordingly to guide it, so that the monitor body 10 above the support plate 4 reaches the preset monitoring height, thereby enabling monitoring of different positions.
[0049] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A ground pressure monitoring device for non-coal mines, comprising a chassis (1) and a mounting frame (2), wherein the bottom of the chassis (1) is provided with a plurality of casters (3), and the mounting frame (2) is vertically fixedly installed at the upper rear end of the chassis (1); Its features are: The upper part of the mounting frame (2) is provided with a support plate (4), and the chassis (1) and the mounting frame (2) are provided with a lifting mechanism. The lifting and moving end of the lifting mechanism is fixedly connected to the support plate (4). It also includes an angle adjustment mechanism and a monitor body (10). The angle adjustment mechanism includes a mounting plate (6), a fixing plate (7), a damping gear (8), and an adjustment base (9). The mounting plate (6) is fixedly installed at the front end of the support plate (4) away from the mounting frame (2). The two sides of the mounting plate (6) are respectively vertically fixed with upwardly extending fixing plates (7). The damping gear (8) is rotatably installed on the inner side of the fixing plate (7). The adjustment base (9) is installed between the two fixing plates (7) above the mounting plate (6). The two ends of the adjustment base (9) are respectively fixedly connected to the damping gear (8) on the two fixing plates (7) on the mounting plate (6). The top of the adjustment base (9) is fixedly provided with an elastic pressing mechanism. The monitor body (10) is detachably installed on the elastic pressing mechanism.
2. The ground pressure monitoring device for non-coal mines according to claim 1, characterized in that: The elastic clamping mechanism includes a placement frame (11), a rebound unit (12), and a lower pressure plate (13). The placement frame (11) is detachably fixed at the top of the adjusting base (9). A connecting groove (14) is provided at the front end of the placement frame (11) away from the mounting frame (2). The lower part of the monitor body (10) is slidably inserted into the connecting groove (14). The rebound unit (12) is located at the rear end of the placement frame (11) near the mounting frame (2). The rear end of the lower pressure plate (13) is slidably inserted into the rear end of the placement frame (11) and connected to the rebound unit (12). The front end of the lower pressure plate (13) extends above the connecting groove (14) and can abut against the top end of the monitor body (10) inserted into the connecting groove (14).
3. The ground pressure monitoring device for non-coal mines according to claim 2, characterized in that: The placement rack (11) is an "L"-shaped double-step structure with a connecting groove (14) located at the top of the lower step. A sliding groove (15) is provided in the upper step of the placement rack (11). The rebound unit (12) is movably disposed in the sliding groove (15) and its bottom end is fixedly connected to the sliding groove (15). A sliding plate (16) that can slide and extend into the sliding groove (15) is fixedly disposed at the rear end of the lower pressure plate (13). The sliding plate (16) is fixedly connected to the upper part of the rebound unit (12).
4. The ground pressure monitoring device for non-coal mines according to claim 3, characterized in that: The rebound unit (12) is a damping spring or a tension spring; at least two sliding grooves (15) are provided at intervals in the upper step of the placement frame (11); the rear end of the lower pressure plate (13) is fixedly provided with a number of sliding plates (16) corresponding to the sliding grooves (15) of the placement frame (11); the sliding groove (15) is a rectangular groove and a mortise is provided at one or both ends; one or both ends of the sliding plate (16) are provided with a tenon that slides with the mortise on the sliding groove (15).
5. The ground pressure monitoring device for non-coal mines according to claim 1, 2, 3 or 4, characterized in that: The lifting mechanism includes a first bracket (21), a first rotating shaft (22), a first sprocket (23), a chain (24), a motor (25), a second bracket (26), a second rotating shaft (27), and a second sprocket (28). On both sides of the top end of the mounting frame (2), first brackets (21) are fixedly provided respectively. The first rotating shaft (22) is arranged above the mounting frame (2) and its two ends are respectively rotatably connected to the two first brackets (21). The motor (25) is fixed on one of the first brackets (21) and the motor shaft is connected to the first rotating shaft (22). Two first sprockets (23) are fixedly arranged on the first rotating shaft (22) at intervals; on both sides inside the machine case (1), second brackets (26) are fixedly provided respectively. The second rotating shaft (27) is parallel to the first rotating shaft (22) and its two ends are respectively rotatably connected to the two second brackets (26). Two second sprockets (28) are fixedly arranged on the second rotating shaft (27) at intervals. The chain (24) is correspondingly sleeved on the first sprocket (23) and the second sprocket (28) on the same side. The two chains (24) are respectively fixedly connected to the support plate (4).
6. The ground pressure monitoring device for non-coal mines according to claim 5, characterized in that: On the left and right sides of the top end and the bottom end of the side of the support plate (4) away from the mounting plate (6), connecting plates (29) are fixedly provided respectively. Hinge ears are provided on the connecting plates (29). The two ends of the chain (24) are respectively hinged to the hinge ears on the connecting plates (29) at the top end and the bottom end of the support plate (4).
7. The ground pressure monitoring device for non-coal mines according to claim 5, characterized in that: Inside the mounting frame (2), below the two connecting plates (29) at the bottom end of the support plate (4), a lifting rod (5) is vertically and fixedly provided. The top end of the sliding rod of the lifting rod (5) is fixedly connected to the bottom end of the support plate (4) between the two connecting plates (29).
8. The ground pressure monitoring device for non-coal mines according to claim 5, characterized in that: The mounting frame (2) is a frame-shaped structure with an open front end.让位孔(30)可活动穿过链条(24)的让位孔(30)are provided in front of and behind the first sprocket (23) at the top end and the bottom end of the mounting frame (2). The machine case (1) is a hollow cube structure and a让位孔(30)可活动穿过链条(24)的让位孔(30) corresponding to the mounting frame (2) is provided at the top end and can pass through the chain (24) movably.
9. The ground pressure monitoring device for non-coal mines according to claim 8, characterized in that: The side of the support plate (4) away from the angle adjustment mechanism is a flat cube structure and extends into the mounting frame (2). The connection point of the two chains (24) at the bottom end of the support plate (4) and the connection point of the top end of the sliding rod of the lifting rod (5) form a "pin" - shaped layout. The side of the support plate (4) close to the angle adjustment mechanism is a cantilever - shaped flat plate extending out of the mounting frame (2) or a flat plate with a diagonal brace at the bottom.
10. The ground pressure monitoring device for non-coal mines according to claim 5, characterized in that: A controller (17) is fixedly provided on the outer side wall of the mounting frame (2). The motor (25) is electrically connected to the controller (17). It should be noted that there seems to be some incorrect or incomplete expressions in the original text for item where "让位孔(30)可活动穿过链条(24)的让位孔(30)" is repeated without clear meaning. This translation is based on the best understanding of the overall context.